HHL could refer to:
Hafthohlladung, a German anti-tank mine of World War II Handelshochschule Leipzig, now the HHL Leipzig Graduate School of Management Haverhill (Amtrak station), in Massachusetts, United States Harrow-Hassidim-Lloyd algorithm, a quantum algorithm for linear systems of equations Heath High Level railway station, in Wales Herefordshire Housing, a British social housing trust Hecht-Hill-Lancaster Productions Higher Hockey League, a Eurasian ice hockey league Highway Hockey League, a Canadian ice hockey league